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Function std.math.rounding.floor

Returns the value of x rounded downward to the next integer (toward negative infinity).

real floor (
  real x
) pure nothrow @nogc @trusted;

double floor (
  double x
) pure nothrow @nogc @trusted;

float floor (
  float x
) pure nothrow @nogc @trusted;


import std.math.traits : isNaN;

writeln(floor(+123.456L)); // +123
writeln(floor(-123.456L)); // -124
writeln(floor(+123.0L)); // +123
writeln(floor(-124.0L)); // -124
writeln(floor(-1.234L)); // -2
writeln(floor(-0.123L)); // -1
writeln(floor(0.0L)); // 0
writeln(floor(+0.123L)); // 0
writeln(floor(+1.234L)); // 1
writeln(floor(real.infinity)); // real.infinity


Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger


Boost License 1.0.